Radioactivity

The rate at which a radioactive element decays is its ___

• quarter life

• whole life

• rate of decay

• half life

The three types of nuclear radiation in order of decreasing penetrating power are

• alpha, beta, gamma

• beta, alpha, gamma

• beta, gamma, alpha

• gamma, beta, alpha

Name the type of radioactive particle that can be stopped by a piece of paper

• alpha

• all of them

• beta

• gamma

Name the most penetrating type of radiation

• alpha

• delta

• beta

• gamma

What makes something radioactive

• elements that have an atomic number above 80

• an unstable nucleus

• unstable energy levels

• decays over time

If the half life of a radioactive element is 200yrs how long would it take for the radioactivity to reduce by one half

• 100yrs

• 150yrs

• 200yrs

• 300yrs

Barium-122 has a half-life of 2 minutes. A sample weighing 160g was obtained. If the experiment using Barium-122 takes 10 minutes to set up. How much barium-122 will remain when the experiment begins

• 5g

• 32g

• 80g

• 160g

Who won two Nobel prizes for work on radioactivity?

____ is the process by which unstable atom emits radiation

• Radiation

• Chemical reaction

• Radioactive decay

• isotopes

Who discovered radioactivity

• Henri Becquerel

• Pierre Curie

• JJ Thompson

• Albert Einstein